001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements. See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership. The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the  "License");
007     * you may not use this file except in compliance with the License.
008     * You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    /*
019     * $Id: Instruction.java 468650 2006-10-28 07:03:30Z minchau $
020     */
021    
022    package org.apache.xalan.xsltc.compiler;
023    
024    import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
025    import org.apache.xalan.xsltc.compiler.util.ErrorMsg;
026    import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
027    import org.apache.xalan.xsltc.compiler.util.Type;
028    import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
029    
030    /**
031     * @author Jacek Ambroziak
032     * @author Santiago Pericas-Geertsen
033     */
034    abstract class Instruction extends SyntaxTreeNode {
035        /**
036         * Type check all the children of this node.
037         */
038        public Type typeCheck(SymbolTable stable) throws TypeCheckError {
039            return typeCheckContents(stable);
040        }
041    
042        /**
043         * Translate this node into JVM bytecodes.
044         */
045        public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
046            ErrorMsg msg = new ErrorMsg(ErrorMsg.NOT_IMPLEMENTED_ERR,
047                                        getClass(), this);
048            getParser().reportError(FATAL, msg);
049        }
050    }